Also, one of The Voice's refrains was 'Silence Will Fall'. Now SM loves his double meanings, but one of the more obvious meanings would be that The Voice wants to bring The Silence down.
A question I would really like to know is when SM decided that the Silence were both a species and a movement. I'd bet it's a tweak he added once the plotline was already underway.

I thought they solved the "Who blew up the Tardis" thing? In that episode "Journey to the Center of the Tardis", the Tardis is exploding and the Doctor ends up stepping through a crack in time that looks a great deal like the crack that was in Amy's wall.

So the whole thing turned out to be ironic. Who blew up the Tardis? Yes he did .